/**
 *  Copyright 2009 Henning Teek, Ingo Renner
 *  
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *  
 *  http://www.apache.org/licenses/LICENSE-2.0
 *  
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License. 
 */
package com.googlecode.chigscommons.web.common;

import org.apache.wicket.ajax.AbstractDefaultAjaxBehavior;
import org.apache.wicket.ajax.AjaxRequestTarget;
import org.apache.wicket.markup.html.IHeaderResponse;

/**
 * @author Ingo Renner
 * @author Henning Teek
 */
public class KeepAliveBehavior  extends AbstractDefaultAjaxBehavior {

	@Override
	protected void respond(AjaxRequestTarget target) {
		// prevent wicket changing focus
		target.focusComponent(null);
	}
	
	@Override
	public void renderHead(IHeaderResponse response) {
		super.renderHead(response);
		response.renderOnLoadJavascript(
				"setInterval(function() { " +
				"  wicketAjaxGet('" + getCallbackUrl(true) + "', null, null, null); " +	"}, 600000);");
	}
}
